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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2017 Mar;64(3):557–568. doi: 10.1109/TBME.2016.2609412

Fig. 4.

Fig. 4

(a) A schematic diagram of the optrode showing the high impedance metal electrode and the optical fiber for optogenetic illumination. (b) A photograph of the optrode.